Shaping tool for shaping an acetabulum

Abstract

A shaping tool shapes a smooth bone cement surface, in particular for implantation of an artificial acetabulum. The shaping tool has a curvature, whereby the shaping tool has a curved base body and at least two layers, whereby a first layer covers the curvature of the base body at least in part and is connected to the base body in a detachable manner, and a second layer covers the first layer at least in part and is connected to the first layer in a detachable manner. The shaping tool is usable to pre-shape a bone cement for insertion of an artificial acetabulum.

The invention claimed is: 
     
       1. A shaping tool for shaping a smooth bone cement surface for implantation of an artificial acetabulum, the shaping tool comprises a curved base body having a first side comprising an outer curved surface and a second side, located opposite with respect to the first side of the curved base body, comprising a flat surface, wherein a sleeve extends outwardly away from the flat surface of the second side of the curved base body, wherein the shaping tool further comprises a first layer covering the outer curved surface of the curved base body and connected to the curved base body in a detachable manner, and at least one second layer covering the first layer and connected to the first layer in a detachable manner, and further wherein the outer curved surface of the curved base body is continuous and uninterrupted. 
     
     
       2. The shaping tool according to  claim 1 , further comprising three to forty second layers, which cover each other, at least in part, in the manner of onion skins, and are connected to each other in a detachable manner. 
     
     
       3. The shaping tool according to  claim 1 , wherein the outer curved surface of the curved base body is a spherical segment. 
     
     
       4. The shaping tool according to  claim 1 , wherein the shaping tool further comprises a handle or an adapter, wherein the handle or the adapter is a tube that tapers on its inside in one direction. 
     
     
       5. The shaping tool according to  claim 4 , wherein the handle or the adapter is a tube-shaped adapter that tapers in discrete steps. 
     
     
       6. The shaping tool according to  claim 4 , wherein the adapter or the handle is pluggable into at least one selected from the curved base body, a depression in the second side of the curved base body and the sleeve on second side of the curved base body. 
     
     
       7. The shaping tool according to  claim 1 , wherein the outer curved surface of the curved base body has a diameter of 35 to 50 mm. 
     
     
       8. The shaping tool according to  claim 1 , wherein a thickness of each layer of the layers is between 0.5 and 15 mm. 
     
     
       9. The shaping tool according to  claim 1 , wherein a tongue is arranged on each layer that is configured to allow the corresponding layer along with all layers arranged above the corresponding layer to be manually detachable from at least one selected from the layers arranged below the corresponding layer and the curved base body, by pulling or lifting the corresponding layer off. 
     
     
       10. The shaping tool according to  claim 1 , wherein the first and second layers are connected to the curved base body and to each other in a manually detachable manner. 
     
     
       11. The shaping tool according to  claim 1 , wherein a labelling is arranged on at least one of the layers and on the curved base body, wherein the labelling allows a diameter of the curved surface of the base body to be read such that a certain size of an artificial acetabulum is allocatable to each layer. 
     
     
       12. The shaping tool according to  claim 1 , wherein the first and second layers are situated in a positive fit within each other and on the curved base body. 
     
     
       13. The shaping tool according to  claim 1 , wherein the first and second layers consist of a hard material or of a soft material. 
     
     
       14. The shaping tool according to  claim 1 , wherein curved surfaces of the curved base body and the first and second layers are smooth. 
     
     
       15. The shaping tool according to  claim 1 , wherein the curved base body and the first and second layers are constructed of materials that are destructible by exposure to steam. 
     
     
       16. A shaping tool for shaping a smooth bone cement surface for implantation of an artificial acetabulum, the shaping tool comprises a curved base body having a first side comprising a curved surface and a second side, located opposite with respect to the first side of the curved base body, comprising a flat surface, wherein a sleeve extends outwardly away from the flat surface of the second side of the curved base body, wherein the shaping tool further comprises a first layer covering the curved surface of the curved base body and connected to the curved base body in a detachable manner, and at least one second layer covering the first layer and connected to the first layer in a detachable manner, wherein the curved base body comprises a circumferential rigid cylindrical tongue. 
     
     
       17. A shaping tool for shaping a smooth bone cement surface for implantation of an artificial acetabulum, the shaping tool comprises a curved base body having a first side comprising an outer curved surface and a second side, located opposite with respect to the first side of the curved base body, comprising an outwardly-facing flat surface, wherein a sleeve extends outwardly away from the outwardly-facing flat surface of the second side of the curved base body, wherein the shaping tool further comprises a first layer covering the curved surface of the curved base body and connected to the curved base body in a detachable manner, and at least one additional layer covering the first layer and connected to the first layer in a detachable manner, and further wherein at least one flat edge of the at least one additional layer, located at an outermost circumference of the at least one additional layer, comprises a bottom-most surface that does not extend beyond a plane defined by the outwardly-facing flat surface of the curved base body. 
     
     
       18. A shaping tool for shaping a smooth bone cement surface for implantation of an artificial acetabulum, the shaping tool comprises a curved base body having an outermost circumference, a first side comprising a curved surface and a second side, located opposite with respect to the first side of the curved base body, comprising a flat surface, wherein a sleeve extends outwardly away from the flat surface of the second side of the curved base body, wherein the shaping tool further comprises a first layer covering the curved surface of the curved base body and connected to the curved base body in a detachable manner, and at least one second layer covering the first layer and connected to the first layer in a detachable manner, and further wherein the flat surface of the curved base body extending from the sleeve of the curved base body to the outermost circumference of the curved base body is continuous and uninterrupted.